Supercell over Laramie
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Wyoming Snow Precipitation Update

United States Natural Resources Water and Climate Center Department of Conservation Portland, Oregon Agriculture Service S N O W - P R E C I P I T A T I O N U P D A T E Based on Mountain Data from NRCS SNOTEL Sites As of WEDNESDAY: OCTOBER 18 , 2023 ------------------------------------------------------------------------------ BASIN ELEV. SNOW WATER EQUIVALENT TOTAL PRECIPITATION Data Site Name (Ft) % % Current Median Median Current Median Med ------------------------------------------------------------------------------ WYOMING SNAKE RIVER Base Camp 7060 -M .0 * 1.3 1.2 108 Blind Bull Sum 8650 .1 .3 33* 1.0 1.0 100 Cottonwood Creek 7670 .1 .0 * 2.7 1.4 193 East Rim Divide 7930 -M .0 * 1.0 .6 167 Grand Targhee 9260 1.1 2.4 46* 3.5 2.6 135 Granite Creek 6770 .0 .0 * 1.0 .8 125 Grassy Lake 7265 -M .0 * 2.0 1.8 111 Gros Ventre Summit 8750 .5 .6 83* 1.8 1.0 180 Gunsight Pass 9820 1.2 .0 * 2.8 1.1 255 Lewis Lake Divide 7850 .1 .0 * 1.2 1.6 75 Loomis Park 8240 .2 .0 * 1.2 .9 133 Phillips Bench 8200 .2 .0 * 1.9 1.3 146 Salt River Summit 7640 .0 .0 * .8 .8 100 Snake River Station 6920 .0 .0 * 1.4 1.0 140 Somsen Ranch 6800 -M .0 * 2.1 .9 233 Spring Creek Divide 9000 .3 .2 150* 1.4 1.0 140 Thumb Divide 7980 .2 .0 * .8 1.2 67 Togwotee Pass 9580 .5 1.4 36* 1.6 1.4 114 Triple Peak 8500 -M .2 * 1.2 1.2 100 Two Ocean Plateau 9240 1.2 1.8 67* 2.3 1.6 144 Willow Creek 8080 -M .0 * 3.1 2.0 155 Younts Peak 8350 -M .2 * -M 1.0 * ----- ----- Basin Index (%) 85* 137 MADISON HEADWATERS IN WYOMING Black Bear 8170 .4 1.2 33* 2.2 2.1 105 Canyon 7870 .0 -M * .9 -M * Madison Plateau 7750 .0 .4 0* 1.2 1.7 71 West Yellowstone 6700 .0 .0 * .8 .8 100 Whiskey Creek 6800 .0 .0 * 1.2 1.2 100 ----- ----- Basin Index (%) 25* 93 YELLOWSTONE HEADWATERS IN WYOMING Beartooth Lake 9360 1.1 1.2 92* 1.7 1.3 131 Canyon 7870 .0 -M * .9 -M * Evening Star 9200 1.3 1.0 130* 3.4 2.0 170 Fisher Creek 9100 .0 1.4 0* 1.6 1.8 89 Monument Peak 8850 .6 1.0 60* 2.2 1.6 138 Northeast Entrance 7350 .0 .0 * .8 .8 100 Parker Peak 9400 .5 1.2 42* 2.4 1.6 150 Sylvan Lake 8420 .0 .6 0* 3.0 1.8 167 Thumb Divide 7980 .2 .0 * .8 1.2 67 Two Ocean Plateau 9240 1.2 1.8 67* 2.3 1.6 144 White Mill 8700 .0 1.1 0* 1.3 1.4 93 Wolverine 7650 .0 .0 * 1.9 1.2 158 ----- ----- Basin Index (%) 53* 131 WIND RIVER Burroughs Creek 8750 .1 -M * .9 -M * Castle Creek 8400 .1 .0 * 1.3 .8 162 Cold Springs 9630 1.1 .0 * 1.9 .8 238 Deer Park 9700 .4 .3 133* 2.0 1.3 154 Hobbs Park 10100 2.6 .8 325* 3.6 1.0 360 Kirwin 9550 2.7 .8 338* 3.5 1.2 292 Little Warm 9370 .7 .3 233* 1.9 1.0 190 South Pass 9040 .2 .0 * 1.6 1.1 145 St. Lawrence Alt 8620 .0 -M * 2.0 -M * Togwotee Pass 9580 .5 1.4 36* 1.6 1.4 114 Townsend Creek 8700 1.3 .0 * 3.1 1.0 310 ----- ----- Basin Index (%) 267* 214 BIGHORN BASIN Bald Mtn. 9380 1.9 2.0 95* 2.3 1.7 135 Bear Trap Meadow 8200 .4 .2 200* 2.9 1.1 264 Bone Springs Div 9350 1.4 1.3 108* 2.8 1.7 165 Grave Springs 8550 .1 .2 50* 1.9 1.0 190 Kirwin 9550 2.7 .8 338* 3.5 1.2 292 Marquette 8760 4.5 .3 1500* 6.5 1.3 500 Middle Powder 7760 .1 .2 50* 3.0 1.2 250 Owl Creek 8975 .3 .2 150* 1.8 1.0 180 Powder River Pass 9480 .9 .7 129* 2.4 1.4 171 Shell Creek 9580 2.2 1.8 122 3.0 1.4 214 Timber Creek 7950 2.4 .0 * 4.4 1.2 367 ----- ----- Basin Index (%) 219* 243 SHOSHONE RIVER Blackwater 9780 2.1 1.5 140* 2.6 1.8 144 Evening Star 9200 1.3 1.0 130* 3.4 2.0 170 Marquette 8760 4.5 .3 1500* 6.5 1.3 500 Sylvan Lake 8420 .0 .6 0* 3.0 1.8 167 Sylvan Road 7120 .0 .0 * 2.0 1.3 154 Younts Peak 8350 -M .2 * -M 1.0 * ----- ----- Basin Index (%) 232* 213 POWDER RIVER Bear Trap Meadow 8200 .4 .2 200* 2.9 1.1 264 Cloud Peak Reservoir 9860 3.6 .9 400* 5.1 1.7 300 Grave Springs 8550 .1 .2 50* 1.9 1.0 190 Hansen Sawmill 8360 2.1 .0 * 2.5 1.2 208 Middle Powder 7760 .1 .2 50* 3.0 1.2 250 Powder River Pass 9480 .9 .7 129* 2.4 1.4 171 Soldier Park 8720 2.1 .0 * 3.5 1.2 292 ----- ----- Basin Index (%) 423* 242 TONGUE RIVER Big Goose 7990 1.6 .4 400* 3.9 1.3 300 Bone Springs Div 9350 1.4 1.3 108* 2.8 1.7 165 Burgess Junction 7880 1.7 .4 425* 4.2 1.3 323 Dome Lake 8880 2.3 .7 329* 3.9 1.5 260 Little Goose 8870 2.4 .0 * 4.4 1.4 314 Sucker Creek 8880 2.6 .8 325* 4.6 1.4 329 Tie Creek 6870 -M .0 * 5.0 1.1 455 ----- ----- Basin Index (%) 333* 297 BELLE FOURCHE Blind Park 6890 .1 .0 * 1.7 1.1 155 Cole Canyon 5910 .0 .0 * 1.2 1.0 120 North Rapid Creek 6130 .0 .0 * 2.2 .9 244 ----- ----- Basin Index (%) * 170 CHEYENNE RIVER BASIN Blind Park 6890 .1 .0 * 1.7 1.1 155 North Rapid Creek 6130 .0 .0 * 2.2 .9 244 ----- ----- Basin Index (%) * 195 UPPER N. PLATTE Arapaho Ridge 10976 .6 1.0 60* 1.1 1.6 69 Blackhall Mtn 9839 1.1 .8 138* 2.4 2.0 120 Cinnabar Park 9707 .1 .3 33* .9 1.2 75 Columbine 9167 -M .0 * 1.4 1.8 78 Divide Peak 8730 .4 .2 200* 2.8 1.6 175 Joe Wright 10158 .6 .4 150* 1.8 2.2 82 Laprele Creek 8390 1.2 .0 * 2.8 .9 311 Med Bow 10512 1.3 -M * 2.3 -M * Never Summer 10323 1.3 .8 162* 1.3 1.7 76 North French Creek 10153 .8 .6 133* 1.9 1.8 106 Old Battle 9860 .8 .8 100* 2.0 1.8 111 Rawah 9069 .6 .0 * 1.7 1.6 106 Sage Creek Basin 7850 .1 .0 * 1.4 1.1 127 Sand Lake 10098 1.9 1.1 173* 2.0 1.6 125 South Brush Creek 8495 .1 .0 * 1.3 .9 144 Tower 10620 1.5 .8 188* 2.4 2.0 120 Webber Springs 9260 .2 .2 100* 1.4 1.6 88 Whiskey Park 9020 .1 .0 * 1.4 1.8 78 Willow Creek Pass 9523 .9 .2 450* 1.2 1.0 120 Zirkel 9338 .1 .0 * 1.2 2.2 55 ----- ----- Basin Index (%) 172* 107 SWEETWATER Deer Park 9700 .4 .3 133* 2.0 1.3 154 Larsen Creek 9000 -M .0 * 1.2 .8 150 South Pass 9040 .2 .0 * 1.6 1.1 145 ----- ----- Basin Index (%) 200* 150 LOWER N. PLATTE Casper Mtn. 7920 3.6 .2 1800* 5.4 1.0 540 Laprele Creek 8390 1.2 .0 * 2.8 .9 311 Reno Hill 8430 2.3 .4 575* 4.4 1.2 367 Windy Peak 7915 .8 .0 * 2.0 .7 286 ----- ----- Basin Index (%) 1317* 384 LARAMIE RIVER Brooklyn Lake 10250 .2 .0 * 1.0 1.0 100 Cinnabar Park 9707 .1 .3 33* .9 1.2 75 Crow Creek 8335 .0 .0 * 1.6 .8 200 Deadman Hill 10239 1.4 1.0 140* 1.4 1.2 117 Rawah 9069 .6 .0 * 1.7 1.6 106 Roach 9740 .6 .3 200* 1.3 1.1 118 Windy Peak 7915 .8 .0 * 2.0 .7 286 ----- ----- Basin Index (%) 231* 130 S. PLATTE Crow Creek 8335 .0 .0 * 1.6 .8 200 ----- ----- Basin Index (%) * 200 LITTLE SNAKE RIVER Battle Mountain 7498 .1 .0 * 1.6 1.0 160 Divide Peak 8730 .4 .2 200* 2.8 1.6 175 Elk River 8739 .3 .0 * 1.1 1.4 79 Elkhead Divide 8800 .1 -M * 1.4 -M * Little Snake River 8928 .1 .0 * 1.8 2.3 78 Old Battle 9860 .8 .8 100* 2.0 1.8 111 Sage Creek Basin 7850 .1 .0 * 1.4 1.1 127 Sandstone RS 8152 -M .0 * 1.2 1.1 109 Whiskey Park 9020 .1 .0 * 1.4 1.8 78 ----- ----- Basin Index (%) 190* 110 UPPER GREEN RIVER Big Sandy Opening 9080 -M .4 * 1.2 1.0 120 Blind Bull Sum 8650 .1 .3 33* 1.0 1.0 100 East Rim Divide 7930 -M .0 * 1.0 .6 167 Elkhart Park G.S. 9400 .0 .0 * 2.0 1.2 167 Gros Ventre Summit 8750 .5 .6 83* 1.8 1.0 180 Gunsight Pass 9820 1.2 .0 * 2.8 1.1 255 Indian Creek 9425 .2 .4 50* 1.4 1.0 140 Kendall R.S. 7740 .0 .0 * 1.5 .8 188 Larsen Creek 9000 -M .0 * 1.2 .8 150 Loomis Park 8240 .2 .0 * 1.2 .9 133 New Fork Lake 8340 -M .0 * .4 .7 57 Pocket Creek 9360 -M -M * -M -M * Snider Basin 8060 -M .0 * .5 .6 83 Spring Creek Divide 9000 .3 .2 150* 1.4 1.0 140 Triple Peak 8500 -M .2 * 1.2 1.2 100 ----- ----- Basin Index (%) 167* 144 LOWER GREEN RIVER Blacks Fork Jct 8869 .0 -M * 1.4 -M * Buck Pasture 9632 .0 -M * 1.8 -M * EF Blacks Fork GS 9360 .0 -M * 1.5 -M * Hams Fork 7840 1.8 .0 * -M .6 * Henrys Fork 10182 -M -M * 1.8 -M * Hewinta 9500 .0 .0 * 1.3 1.0 130 Hickerson Park 9122 .2 .0 * 2.3 .7 329 Hole-in-Rock 9168 .0 .0 * 1.6 .9 178 Indian Creek 9425 .2 .4 50* 1.4 1.0 140 Kelley R.S. 8180 .3 .0 * 1.0 .7 143 Spirit Lk 10235 .1 .0 * 2.6 1.1 236 Steel Creek Park 10158 .6 .4 150* 1.9 1.0 190 ----- ----- Basin Index (%) 400* 189 UPPER BEAR RIVER Bear River RS 8777 .0 -M * 1.1 -M * Bug Lake 7987 .3 .0 * 1.2 .7 171 Burts Miller Ranch 8000 .2 .0 * 1.1 .6 183 Chalk Creek #1 9171 .2 .0 * 2.1 1.3 162 Giveout 6930 -M .0 * .6 .8 75 Hayden Fork 9130 .0 .0 * 2.1 1.2 175 Kelley R.S. 8180 .3 .0 * 1.0 .7 143 Lily Lake 9133 .1 .0 * 1.6 1.1 145 Monte Cristo 8932 .0 .0 * 1.7 1.1 155 Salt River Summit 7640 .0 .0 * .8 .8 100 Spring Creek Divide 9000 .3 .2 150* 1.4 1.0 140 Trial Lake 9992 .0 .0 * 1.8 1.2 150 ----- ----- Basin Index (%) 700* 147 ----------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Median (or Average) Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median (or Average) represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. The TOTAL PRECIPITATION Percent of Median (or Average) represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Median (or Average) value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1991-2020. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median or average for the day is less than 10% of the maximum median or average value for the year. * Basin - More than half of the stations for a basin with medians (or averages) report missing or invalid data The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians or averages and the resulting fraction multiplied by 100. ---------------------------------------------------------------------------- -M = Missing data * = Data may not provide a valid measure of conditions. Units = inches for the Current and Normal Snow Water Equivalent and Total Precipitation values If the Basin Index (%) value is flagged as potentially invalid, care should be taken to evaluate if the value is representative of conditions in the basin. The SNOW WATER EQUIVALENT Percent of Median represents the snow water equivalent found at selected SNOTEL sites in or near the basin compared to the Median value for those sites on this day. The TOTAL PRECIPITATION Percent of Average represents the total precipitation (beginning October 1st) found at selected SNOTEL sites in or near the basin compared to the Average value for those sites on this day. Contact your state water supply staff for assistance. Medians and averages are calculated for the period 1981-2010. Provisional data, subject to revision. * Site -- Either: (a) the current value is missing; (b) the median or average for the day is not available or is zero; or (c) for snow water equivalent, the median for the day is less than 10% of the maximum median value for the year. * Basin - More than half of the sites within the basin are flagged with *, preventing the calculation of a meaningful basin index. The basin index is calculated as the sum of the valid current values divided by the sum of the corresponding medians (for snow water equivalent) or averages (for precipitation) and the resulting fraction multiplied by 100.